diff --git a/.github/workflows/main.yml b/.github/workflows/main.yml
index ae7914d..34af936 100644
--- a/.github/workflows/main.yml
+++ b/.github/workflows/main.yml
@@ -63,6 +63,8 @@ jobs:
     needs:
       - build
     steps:
+      - name: install tree
+        run: apt update && apt install tree -y
       - name: set gradle opts
         uses: allenevans/set-env@v2.0.0
         with: